Introduction
Welcome to your Line 6 Spider III 15-Watt Guitar Combo Amplifier. This manual provides essential information for setting up, operating, and maintaining your amplifier. Please read these instructions carefully to ensure proper use and to maximize your amplifier's performance.
Key Features
- 4 Essential Amp Models
- 6 Effects (2 simultaneous) including Phaser, Chorus/Flanger, Tremolo, Sweep Echo, Tape Echo, and Reverb
- 4 User-programmable channels
- CD/MP3 input jack
- Headphone/Direct Out for practice or recording
- Custom 8-inch speaker
- 15 Watts output power
Setup Instructions
Unpacking
Carefully remove the amplifier from its packaging. Inspect the unit for any signs of damage that may have occurred during shipping. Retain the packaging for future transport or storage.
Power Connection
Connect the amplifier to a standard AC power outlet using the provided power cord. Ensure the amplifier's power switch is in the "Off" position before connecting to a power source.
Instrument Connection
Plug your guitar into the "Input" jack located on the front panel of the amplifier using a standard 1/4-inch instrument cable.
CD/MP3 Input
For playing along with external audio sources, connect your CD player or MP3 device to the "CD/MP3 Input" jack using a 3.5mm stereo cable.
Headphone/Recording Output
For silent practice or direct recording, connect headphones or a recording device to the "Headphone/Direct Out" jack. This output provides a simulated speaker tone.
Operation Guide
Powering On/Off
To power on the amplifier, flip the power switch to the "On" position. Always ensure the Master volume knob is turned down before powering on or off to prevent sudden loud noises.
Controls Overview
The front panel of your Line 6 Spider III amplifier features various controls to shape your sound and manage effects. Familiarize yourself with these controls for optimal performance.

Figure 1: Front Panel Controls of the Line 6 Spider III Amplifier. This image displays the input jack, channel selection buttons, drive, tone (bass, mid, treble), channel volume, effects knobs, and master volume.
Channel Selection
Use the channel selector buttons to choose between the four available amp models: Clean, Crunch, Metal, and Insane. Each channel offers a distinct tonal characteristic.
Tone Adjustment
Adjust the Bass, Mid, and Treble knobs to sculpt your amplifier's tone. The Drive knob controls the amount of gain, influencing the level of distortion or overdrive.
Volume Control
The Channel Volume knob adjusts the output level for the currently selected amp model. The Master volume knob controls the overall output level of the entire amplifier.
Amp Models
The Line 6 Spider III 15-Watt amplifier provides four distinct amp models, each designed to deliver a specific sound:
Clean
This amp model produces crisp, clear, and articulate tones. It is ideal for genres requiring pristine clean sounds, warm jazz tones, and bright, shimmering high-end frequencies with a solid low-end foundation.
Crunch
Based on a '68 Marshall Plexi 100-watt amplifier, this model delivers a classic rock crunch. It captures the infamous "brown sound" with a combination of a Variac and jumped input channels.
Metal
Inspired by the Mesa/Boogie Dual Rectifier, the Metal amp model provides a tight, punchy, and high-gain sound. It is suitable for modern metal and heavy rock genres.
Insane
This model is a highly aggressive, high-gain version based on the Mesa/Boogie Dual Rectifier red channel. It offers intense impact and a bone-crushing, brain-piercing grind with enhanced midrange presence, optimized for shredding.
Smart Control FX
The Spider III amplifier features Smart Control FX, allowing you to easily dial in and use up to two effects simultaneously. Simply select the desired effect and adjust its intensity using the dedicated knob.
- Phaser: Creates a swirling, sweeping effect.
- Chorus/Flanger: Adds thickness and movement to your sound.
- Tremolo: Produces a pulsating volume modulation.
- Sweep Echo: A dynamic echo effect.
- Tape Echo: Simulates the warm, decaying repeats of vintage tape delay units.
- Reverb: Adds spaciousness and ambiance to your tone.
Maintenance and Care
Cleaning
Use a soft, dry cloth to clean the exterior of your amplifier. Avoid using abrasive cleaners, solvents, or excessive moisture, as these can damage the finish and internal components.
Storage
When not in use, store the amplifier in a dry, cool environment, away from direct sunlight, extreme temperatures, and high humidity. Ensure it is protected from dust.
Transportation
Before transporting the amplifier, ensure it is powered off and disconnected from all cables. Use the integrated carrying handle for safe and secure transport.
Troubleshooting
No Sound
- Verify that the amplifier is powered on and the power indicator light is illuminated.
- Ensure your guitar is properly connected to the "Input" jack.
- Check that both the Master volume and Channel volume knobs are turned up to an audible level.
- Test with a different guitar cable to rule out a faulty cable.
Distorted or Unwanted Noise
- Check all cable connections for looseness.
- If the distortion is unintentional, reduce the "Drive" setting.
- Ensure no external electronic devices are causing interference.
Effects Not Working
- Confirm that the desired effect knob is turned up to an audible intensity.
- Remember that only two effects can be active simultaneously. Ensure you are not attempting to activate more than two.
Technical Specifications
| Specification | Value |
|---|---|
| Model Number | 99-010-2505 |
| Output Wattage | 15 Watts |
| Speaker Size | Custom 8-inch |
| Item Weight | 20.2 pounds (9.16 kg) |
| Product Dimensions (L x W x H) | 8 x 16 x 15 inches (20.32 x 40.64 x 38.1 cm) |
| Power Source | Corded Electric |
| Material Type | Wood |
| Connector Type | 3.5mm Jack (for CD/MP3 Input) |
| Compatible Devices | Guitar |

Figure 2: Dimensions of the Line 6 Spider III Amplifier. The image illustrates the height (15"), depth (8"), and width (16") of the amplifier.
Warranty and Support
For detailed warranty information, technical support, and service inquiries, please visit the official Line 6 website or contact their customer service department. It is recommended to retain your purchase receipt as proof of purchase for any warranty claims.





